Updated newtonsoft.json
Fixed 'Bug 20253 - Error during code completion of
System.Globalization.CultureInfo.'.
Fixed 'Bug 20234 - Expand Selection command selects whole conditional
blocks instead of expressions'.
Fix shared projects compat issue with VS

Don't create or save build configurations for shared projects.
Don't add the location prefix to the DependentUpon property of files.

Fixes bug #20257 - Some shared projects created by XS can't be opened in VS.
Fix crash when cleaning project

It happens when cleaning a project that it has an incorrect configuration
mapping.

Fixes bug #20145 - On building Xamarin.Forms Shared solution, it displays
"Clean failed. Object reference not set to an instance of an object" in XS
status bar

Fixes bug #20251 - Xamarin 3: Unable to clean with 2 solutions loaded
Commit
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'origin/master'